| July 1998 | Flash Flood | Arco | $20,000 | BLM reported road washed out on Big Southern Butte by 1 to 2 inches of rain from a thunderstorm. BLM estimated the storm caused a 50 year flood on the butte. |
| June 2025 | Lightning | Arco | $7,000 | A telephone pole was hit by lightning and caught on fire. |
| April 2009 | Thunderstorm Wind | Arco | $4,000 | The Arco mesonet site measured 63 mph wind gusts from a thunderstorms. Several trees were blown over in the city of Arco and the wind destroyed a large plate glass window in a flower shop. |
| July 2024 | Thunderstorm Wind | Arco | $3,000 | Power lines were downed off of Highway Drive in the areas of US 20 which caused a fire and several power outages. |
| August 2011 | Flash Flood | Arco | $2,000 | Heavy rains and small hail caused flooding in Arco. Roadways in town flooded with damage reported by law enforcement. Hail was up to 2 inches deep in some parts of town. The basement in the new court house in Arco was flooded as well. |
| June 2016 | Thunderstorm Wind | Arco | $1,000 | Sixty mile per hour winds moved through Butte County on the 30th with Arco recording 63 mph at 2:55 pm MDT. Several small limbs were torn off trees in the city. |
| August 2014 | Flash Flood | Arco | $1,000 | COOP Observer reported 1 to 2 inches of water flowing across Highway 93 in the city of Arco. Minor residential flooding occurred with some flooding at the hospital. A city bridge on Era street washed out and the street was closed and minor flooding occurred on Highway 33. |
| April 2026 | Thunderstorm Wind | Arco | - | A 60 mph thunderstorm outflow wind gust measured at Tom Cat Summit ITD mesonet site. |
| April 2026 | Thunderstorm Wind | Arco | - | A 59 mph thunderstorm outflow wind gust was measured at the Tom Cat Summit ITD mesonet site. |
| April 2026 | Thunderstorm Wind | Arco | - | The INL Puzzle site recorded a 61 mph thunderstorm outflow wind. |
| May 2025 | Thunderstorm Wind | Arco | - | The INL Critical Infrastructure mesonet site recorded a 59 mph wind gust. |
| May 2025 | Thunderstorm Wind | Arco | - | The INL Puzzle mesonet site on US highways 20 and 26 recorded a 70 mph wind gust. |
| May 2025 | Thunderstorm Wind | Arco | - | A 58 mph wind gust was recorded at the Craters of the Moon mesonet site. |
| May 2025 | Thunderstorm Wind | Arco | - | Mesonet station 3699 D6 INL Puzzle recorded a 60 mph wind gust. |
| May 2025 | Thunderstorm Wind | Arco | - | A 64 mph wind gust was recorded at Big Southern Butte. |
| May 2025 | Thunderstorm Wind | Arco | - | A 62 mph wind gust was recorded at the INL Central Facilities mesonet station. |
| May 2025 | Thunderstorm Wind | Arco | - | A 61 mph wind gust recorded at Lost River Rest Area. |
| May 2025 | Thunderstorm Wind | Arco | - | A 68 mph wind gust recorded at mesonet station TRA INL Reactor Tech Complex. |
| May 2025 | Thunderstorm Wind | Arco | - | A 64 mph wind gust recorded at mesonet station GRI INL INTEC/Grid 3. |
| May 2025 | Thunderstorm Wind | Arco | - | A 59 mph wind gust recorded at INL Puzzle mesonet site. |
| May 2025 | Thunderstorm Wind | Arco | - | A 59 mph wind gust recorded at INL Central Facilities. |
| May 2025 | Thunderstorm Wind | Arco | - | A 59 mph wind gust measured at the Tom Cat Summit mesonet site. |
| May 2025 | Thunderstorm Wind | Arco | - | A 59 mph wind gust recorded at Craters of the Moon mesonet site. |
| May 2025 | Thunderstorm Wind | Arco | - | A 58 mph wind gust measured at the INL Central Facilities mesonet site. |
| May 2025 | Thunderstorm Wind | Arco | - | A 60 mph thunderstorm outflow wind measured 9 miles east of Butte City at the Dead Man Canyon mesonet site. |
| June 2025 | Thunderstorm Wind | Arco | - | Thunderstorm winds caused power outages in parts of Butte County. |
| July 2025 | Thunderstorm Wind | Arco | - | A 60 mph wind gust measured at INL Puzzle ITD site. |
| July 2025 | Thunderstorm Wind | Arco | - | A 69 mph thunderstorm outflow wind gust was measured at the INL Puzzle mesonet site. |
| July 2025 | Thunderstorm Wind | Arco | - | The Big Coxs Well mesonet station recorded a 59 mph thunderstorm outflow wind. |
| May 2024 | Thunderstorm Wind | Arco | - | The ITD Tom Cat Summit mesonet site recorded an 80 mph wind gust. |
| July 2024 | Thunderstorm Wind | Arco | - | ITD 95 RWIS INL Puzzle measured 59 mph wind gust at intersection of US 20 and US 26. |
| July 2024 | Thunderstorm Wind | Arco | - | A 60 mph wind gust measured near Arco at the ARC mesonet site. |
| July 2024 | Thunderstorm Wind | Arco | - | A 70 mph wind gust measured at Big Southern Butte. |
| July 2024 | Thunderstorm Wind | Arco | - | A 59 mph wind gust measured at the GRI INL INTEC/Grid 3 mesonet site. |
| September 2024 | Thunderstorm Wind | Arco | - | A 65 mph thunderstorm outflow wind measured at Craters of the Moon. |
| September 2024 | Thunderstorm Wind | Arco | - | A 60 mph wind gust recorded at Big Southern Butte. |
| August 2024 | Thunderstorm Wind | Arco | - | INL Puzzle site RWIS ITD95 recorded a 64 mph wind gust. |
| August 2024 | Thunderstorm Wind | Arco | - | A 66 mph wind gust measured at Tom Cat Summit. |
| August 2024 | Thunderstorm Wind | Arco | - | A 62 mph wind gust at Big Southen Butte. |
| August 2024 | Thunderstorm Wind | Arco | - | INL Specific Manufacturing Site measured a 59 mph thunderstorm outflow wind. |
| August 2024 | Thunderstorm Wind | Arco | - | A 64 mph thunderstorm outflow wind gust was recorded at Big Southern Butte. |
| August 2024 | Thunderstorm Wind | Arco | - | A 62 mph thunderstorm outflow wind gust measured at Cox's Well. |
| August 2024 | Thunderstorm Wind | Arco | - | A 60 mph wind gust at Big Southern Butte. |
| August 2024 | Thunderstorm Wind | Arco | - | A 67 mph wind gust at Big Cox's Well. |
| August 2024 | Thunderstorm Wind | Arco | - | A 62 mph wind gust at TRA Reactor Technologies Complex at INL. |
| June 2023 | Thunderstorm Wind | Arco | - | A 59 mph thunderstorm outflow wind measured at INL Specific Manufacturing site. |
| August 2023 | Thunderstorm Wind | Arco | - | A 66 mph wind gust measured at Dead Man Canyon. |
| May 2022 | Thunderstorm Wind | Arco | - | A thunderstorm outflow wind of 58 mph was measured 12 miles northwest of Atomic City at the INL Reactor Tech Complex. |
| May 2022 | Thunderstorm Wind | Arco | - | Mesonet site 3699 D6 Puzzle 6 miles northwest of Atomic City recorded a 62 mph wind gust. |
| July 2022 | Thunderstorm Wind | Arco | - | A 58 mph thunderstorm outflow wind gust measured at the Big Southern Butte mesonet site. |
| July 2022 | Thunderstorm Wind | Arco | - | A 62 mph wind gust measured at the INL Reactor Tech complex. |
| September 2022 | Thunderstorm Wind | Arco | - | A 68 mph wind gust measured at the ITD INL Puzzle site. |
| September 2021 | Thunderstorm Wind | Arco | - | A 60 mph wind gust 12 miles southeast of Butte City. |
| August 2021 | Thunderstorm Wind | Arco | - | Lost River Area mesonet recorded 61 mph wind gust. |
| August 2021 | Thunderstorm Wind | Arco | - | A 60 mph gust at INL Radioactive Waste Management site. |
| August 2021 | Thunderstorm Wind | Arco | - | INL Critical Infrastructure site recorded a 64 mph gust. |
| August 2021 | Thunderstorm Wind | Arco | - | A 63 mph wind gust at the INL central facilities. |
| August 2021 | Thunderstorm Wind | Arco | - | A 69 mph wind gust at INL Reactor Technologies Complex. |
| August 2021 | Thunderstorm Wind | Arco | - | A 64 mph wind gust at at the INL Puzzle/US Highway 20 site. |
| May 2020 | Thunderstorm Wind | Arco | - | A 74 mph wind gust measured at Deadman Canyon. |